public class Test {
    public static void main(String[] args) {
        Square square = new Square(12.0,10.0);
        double perimmmeter = square.Perimmmeter(12.0,10.0);
        double area = square.Area(12.0,10.0);

        System.out.println("正方形的周长" + perimmmeter+ "正方形的面积" + area);
    }
}
